Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 1 | /* |
| 2 | * tps80031-regulator.c -- TI TPS80031 regulator driver. |
| 3 | * |
Axel Lin | 1a7ae58 | 2012-11-22 16:30:44 +0800 | [diff] [blame] | 4 | * Regulator driver for TI TPS80031/TPS80032 Fully Integrated Power |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 5 | * Management with Power Path and Battery Charger. |
| 6 | * |
| 7 | * Copyright (c) 2012, NVIDIA Corporation. |
| 8 | * |
| 9 | * Author: Laxman Dewangan <ldewangan@nvidia.com> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation version 2. |
| 14 | * |
| 15 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, |
| 16 | * whether express or implied; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 23 | * 02111-1307, USA |
| 24 | */ |
| 25 | |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/err.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/mfd/tps80031.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/platform_device.h> |
| 33 | #include <linux/regulator/driver.h> |
| 34 | #include <linux/regulator/machine.h> |
| 35 | #include <linux/slab.h> |
| 36 | |
| 37 | /* Flags for DCDC Voltage reading */ |
| 38 | #define DCDC_OFFSET_EN BIT(0) |
| 39 | #define DCDC_EXTENDED_EN BIT(1) |
| 40 | #define TRACK_MODE_ENABLE BIT(2) |
| 41 | |
| 42 | #define SMPS_MULTOFFSET_VIO BIT(1) |
| 43 | #define SMPS_MULTOFFSET_SMPS1 BIT(3) |
| 44 | #define SMPS_MULTOFFSET_SMPS2 BIT(4) |
| 45 | #define SMPS_MULTOFFSET_SMPS3 BIT(6) |
| 46 | #define SMPS_MULTOFFSET_SMPS4 BIT(0) |
| 47 | |
| 48 | #define SMPS_CMD_MASK 0xC0 |
| 49 | #define SMPS_VSEL_MASK 0x3F |
| 50 | #define LDO_VSEL_MASK 0x1F |
| 51 | #define LDO_TRACK_VSEL_MASK 0x3F |
| 52 | |
| 53 | #define MISC2_LDOUSB_IN_VSYS BIT(4) |
| 54 | #define MISC2_LDOUSB_IN_PMID BIT(3) |
| 55 | #define MISC2_LDOUSB_IN_MASK 0x18 |
| 56 | |
| 57 | #define MISC2_LDO3_SEL_VIB_VAL BIT(0) |
| 58 | #define MISC2_LDO3_SEL_VIB_MASK 0x1 |
| 59 | |
| 60 | #define BOOST_HW_PWR_EN BIT(5) |
| 61 | #define BOOST_HW_PWR_EN_MASK BIT(5) |
| 62 | |
| 63 | #define OPA_MODE_EN BIT(6) |
| 64 | #define OPA_MODE_EN_MASK BIT(6) |
| 65 | |
| 66 | #define USB_VBUS_CTRL_SET 0x04 |
| 67 | #define USB_VBUS_CTRL_CLR 0x05 |
| 68 | #define VBUS_DISCHRG 0x20 |
| 69 | |
| 70 | struct tps80031_regulator_info { |
| 71 | /* Regulator register address.*/ |
| 72 | u8 trans_reg; |
| 73 | u8 state_reg; |
| 74 | u8 force_reg; |
| 75 | u8 volt_reg; |
| 76 | u8 volt_id; |
| 77 | |
| 78 | /*Power request bits */ |
| 79 | int preq_bit; |
| 80 | |
| 81 | /* used by regulator core */ |
| 82 | struct regulator_desc desc; |
| 83 | |
| 84 | }; |
| 85 | |
| 86 | struct tps80031_regulator { |
| 87 | struct device *dev; |
| 88 | struct regulator_dev *rdev; |
| 89 | struct tps80031_regulator_info *rinfo; |
| 90 | |
| 91 | u8 device_flags; |
| 92 | unsigned int config_flags; |
| 93 | unsigned int ext_ctrl_flag; |
| 94 | }; |
| 95 | |
| 96 | static inline struct device *to_tps80031_dev(struct regulator_dev *rdev) |
| 97 | { |
| 98 | return rdev_get_dev(rdev)->parent->parent; |
| 99 | } |
| 100 | |
| 101 | static int tps80031_reg_is_enabled(struct regulator_dev *rdev) |
| 102 | { |
| 103 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 104 | struct device *parent = to_tps80031_dev(rdev); |
| 105 | u8 reg_val; |
| 106 | int ret; |
| 107 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 108 | if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ) |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 109 | return true; |
| 110 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 111 | ret = tps80031_read(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg, |
| 112 | ®_val); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 113 | if (ret < 0) { |
| 114 | dev_err(&rdev->dev, "Reg 0x%02x read failed, err = %d\n", |
| 115 | ri->rinfo->state_reg, ret); |
| 116 | return ret; |
| 117 | } |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 118 | return ((reg_val & TPS80031_STATE_MASK) == TPS80031_STATE_ON); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | static int tps80031_reg_enable(struct regulator_dev *rdev) |
| 122 | { |
| 123 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 124 | struct device *parent = to_tps80031_dev(rdev); |
| 125 | int ret; |
| 126 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 127 | if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ) |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 128 | return 0; |
| 129 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 130 | ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg, |
| 131 | TPS80031_STATE_ON, TPS80031_STATE_MASK); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 132 | if (ret < 0) { |
| 133 | dev_err(&rdev->dev, "Reg 0x%02x update failed, err = %d\n", |
| 134 | ri->rinfo->state_reg, ret); |
| 135 | return ret; |
| 136 | } |
| 137 | return ret; |
| 138 | } |
| 139 | |
| 140 | static int tps80031_reg_disable(struct regulator_dev *rdev) |
| 141 | { |
| 142 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 143 | struct device *parent = to_tps80031_dev(rdev); |
| 144 | int ret; |
| 145 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 146 | if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ) |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 147 | return 0; |
| 148 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 149 | ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg, |
| 150 | TPS80031_STATE_OFF, TPS80031_STATE_MASK); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 151 | if (ret < 0) |
| 152 | dev_err(&rdev->dev, "Reg 0x%02x update failed, err = %d\n", |
| 153 | ri->rinfo->state_reg, ret); |
| 154 | return ret; |
| 155 | } |
| 156 | |
| 157 | /* DCDC voltages for the selector of 58 to 63 */ |
| 158 | static int tps80031_dcdc_voltages[4][5] = { |
| 159 | { 1350, 1500, 1800, 1900, 2100}, |
| 160 | { 1350, 1500, 1800, 1900, 2100}, |
| 161 | { 2084, 2315, 2778, 2932, 3241}, |
| 162 | { 4167, 2315, 2778, 2932, 3241}, |
| 163 | }; |
| 164 | |
| 165 | static int tps80031_dcdc_list_voltage(struct regulator_dev *rdev, unsigned sel) |
| 166 | { |
| 167 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 168 | int volt_index = ri->device_flags & 0x3; |
| 169 | |
| 170 | if (sel == 0) |
| 171 | return 0; |
| 172 | else if (sel < 58) |
| 173 | return regulator_list_voltage_linear(rdev, sel - 1); |
| 174 | else |
| 175 | return tps80031_dcdc_voltages[volt_index][sel - 58] * 1000; |
| 176 | } |
| 177 | |
| 178 | static int tps80031_dcdc_set_voltage_sel(struct regulator_dev *rdev, |
| 179 | unsigned vsel) |
| 180 | { |
| 181 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 182 | struct device *parent = to_tps80031_dev(rdev); |
| 183 | int ret; |
| 184 | u8 reg_val; |
| 185 | |
| 186 | if (ri->rinfo->force_reg) { |
| 187 | ret = tps80031_read(parent, ri->rinfo->volt_id, |
| 188 | ri->rinfo->force_reg, ®_val); |
| 189 | if (ret < 0) { |
| 190 | dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", |
| 191 | ri->rinfo->force_reg, ret); |
| 192 | return ret; |
| 193 | } |
| 194 | if (!(reg_val & SMPS_CMD_MASK)) { |
| 195 | ret = tps80031_update(parent, ri->rinfo->volt_id, |
| 196 | ri->rinfo->force_reg, vsel, SMPS_VSEL_MASK); |
| 197 | if (ret < 0) |
| 198 | dev_err(ri->dev, |
| 199 | "reg 0x%02x update failed, e = %d\n", |
| 200 | ri->rinfo->force_reg, ret); |
| 201 | return ret; |
| 202 | } |
| 203 | } |
| 204 | ret = tps80031_update(parent, ri->rinfo->volt_id, |
| 205 | ri->rinfo->volt_reg, vsel, SMPS_VSEL_MASK); |
| 206 | if (ret < 0) |
| 207 | dev_err(ri->dev, "reg 0x%02x update failed, e = %d\n", |
| 208 | ri->rinfo->volt_reg, ret); |
| 209 | return ret; |
| 210 | } |
| 211 | |
| 212 | static int tps80031_dcdc_get_voltage_sel(struct regulator_dev *rdev) |
| 213 | { |
| 214 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 215 | struct device *parent = to_tps80031_dev(rdev); |
| 216 | uint8_t vsel = 0; |
| 217 | int ret; |
| 218 | |
| 219 | if (ri->rinfo->force_reg) { |
| 220 | ret = tps80031_read(parent, ri->rinfo->volt_id, |
| 221 | ri->rinfo->force_reg, &vsel); |
| 222 | if (ret < 0) { |
| 223 | dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", |
| 224 | ri->rinfo->force_reg, ret); |
| 225 | return ret; |
| 226 | } |
| 227 | |
| 228 | if (!(vsel & SMPS_CMD_MASK)) |
| 229 | return vsel & SMPS_VSEL_MASK; |
| 230 | } |
| 231 | ret = tps80031_read(parent, ri->rinfo->volt_id, |
| 232 | ri->rinfo->volt_reg, &vsel); |
| 233 | if (ret < 0) { |
| 234 | dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", |
| 235 | ri->rinfo->volt_reg, ret); |
| 236 | return ret; |
| 237 | } |
| 238 | return vsel & SMPS_VSEL_MASK; |
| 239 | } |
| 240 | |
| 241 | static int tps80031_ldo_set_voltage_sel(struct regulator_dev *rdev, |
| 242 | unsigned sel) |
| 243 | { |
| 244 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 245 | struct device *parent = to_tps80031_dev(rdev); |
| 246 | int ret; |
| 247 | |
| 248 | /* Check for valid setting for TPS80031 or TPS80032-ES1.0 */ |
| 249 | if ((ri->rinfo->desc.id == TPS80031_REGULATOR_LDO2) && |
| 250 | (ri->device_flags & TRACK_MODE_ENABLE)) { |
| 251 | unsigned nvsel = (sel) & 0x1F; |
| 252 | if (((tps80031_get_chip_info(parent) == TPS80031) || |
| 253 | ((tps80031_get_chip_info(parent) == TPS80032) && |
| 254 | (tps80031_get_pmu_version(parent) == 0x0))) && |
| 255 | ((nvsel == 0x0) || (nvsel >= 0x19 && nvsel <= 0x1F))) { |
| 256 | dev_err(ri->dev, |
| 257 | "Invalid sel %d in track mode LDO2\n", |
| 258 | nvsel); |
| 259 | return -EINVAL; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | ret = tps80031_write(parent, ri->rinfo->volt_id, |
| 264 | ri->rinfo->volt_reg, sel); |
| 265 | if (ret < 0) |
| 266 | dev_err(ri->dev, "Error in writing reg 0x%02x, e = %d\n", |
| 267 | ri->rinfo->volt_reg, ret); |
| 268 | return ret; |
| 269 | } |
| 270 | |
| 271 | static int tps80031_ldo_get_voltage_sel(struct regulator_dev *rdev) |
| 272 | { |
| 273 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 274 | struct device *parent = to_tps80031_dev(rdev); |
| 275 | uint8_t vsel; |
| 276 | int ret; |
| 277 | |
| 278 | ret = tps80031_read(parent, ri->rinfo->volt_id, |
| 279 | ri->rinfo->volt_reg, &vsel); |
| 280 | if (ret < 0) { |
| 281 | dev_err(ri->dev, "Error in writing the Voltage register\n"); |
| 282 | return ret; |
| 283 | } |
| 284 | return vsel & rdev->desc->vsel_mask; |
| 285 | } |
| 286 | |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 287 | static int tps80031_vbus_is_enabled(struct regulator_dev *rdev) |
| 288 | { |
| 289 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 290 | struct device *parent = to_tps80031_dev(rdev); |
| 291 | int ret = -EIO; |
| 292 | uint8_t ctrl1 = 0; |
| 293 | uint8_t ctrl3 = 0; |
| 294 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 295 | ret = tps80031_read(parent, TPS80031_SLAVE_ID2, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 296 | TPS80031_CHARGERUSB_CTRL1, &ctrl1); |
| 297 | if (ret < 0) { |
| 298 | dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", |
| 299 | TPS80031_CHARGERUSB_CTRL1, ret); |
| 300 | return ret; |
| 301 | } |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 302 | ret = tps80031_read(parent, TPS80031_SLAVE_ID2, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 303 | TPS80031_CHARGERUSB_CTRL3, &ctrl3); |
| 304 | if (ret < 0) { |
| 305 | dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", |
Axel Lin | 1a7ae58 | 2012-11-22 16:30:44 +0800 | [diff] [blame] | 306 | TPS80031_CHARGERUSB_CTRL3, ret); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 307 | return ret; |
| 308 | } |
| 309 | if ((ctrl1 & OPA_MODE_EN) && (ctrl3 & BOOST_HW_PWR_EN)) |
| 310 | return 1; |
| 311 | return ret; |
| 312 | } |
| 313 | |
| 314 | static int tps80031_vbus_enable(struct regulator_dev *rdev) |
| 315 | { |
| 316 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 317 | struct device *parent = to_tps80031_dev(rdev); |
| 318 | int ret; |
| 319 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 320 | ret = tps80031_set_bits(parent, TPS80031_SLAVE_ID2, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 321 | TPS80031_CHARGERUSB_CTRL1, OPA_MODE_EN); |
| 322 | if (ret < 0) { |
| 323 | dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", |
| 324 | TPS80031_CHARGERUSB_CTRL1, ret); |
| 325 | return ret; |
| 326 | } |
| 327 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 328 | ret = tps80031_set_bits(parent, TPS80031_SLAVE_ID2, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 329 | TPS80031_CHARGERUSB_CTRL3, BOOST_HW_PWR_EN); |
| 330 | if (ret < 0) { |
| 331 | dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", |
| 332 | TPS80031_CHARGERUSB_CTRL3, ret); |
| 333 | return ret; |
| 334 | } |
| 335 | return ret; |
| 336 | } |
| 337 | |
| 338 | static int tps80031_vbus_disable(struct regulator_dev *rdev) |
| 339 | { |
| 340 | struct tps80031_regulator *ri = rdev_get_drvdata(rdev); |
| 341 | struct device *parent = to_tps80031_dev(rdev); |
| 342 | int ret = 0; |
| 343 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 344 | if (ri->config_flags & TPS80031_VBUS_DISCHRG_EN_PDN) { |
| 345 | ret = tps80031_write(parent, TPS80031_SLAVE_ID2, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 346 | USB_VBUS_CTRL_SET, VBUS_DISCHRG); |
| 347 | if (ret < 0) { |
| 348 | dev_err(ri->dev, "reg 0x%02x write failed, e = %d\n", |
| 349 | USB_VBUS_CTRL_SET, ret); |
| 350 | return ret; |
| 351 | } |
| 352 | } |
| 353 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 354 | ret = tps80031_clr_bits(parent, TPS80031_SLAVE_ID2, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 355 | TPS80031_CHARGERUSB_CTRL1, OPA_MODE_EN); |
| 356 | if (ret < 0) { |
| 357 | dev_err(ri->dev, "reg 0x%02x clearbit failed, e = %d\n", |
| 358 | TPS80031_CHARGERUSB_CTRL1, ret); |
| 359 | return ret; |
| 360 | } |
| 361 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 362 | ret = tps80031_clr_bits(parent, TPS80031_SLAVE_ID2, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 363 | TPS80031_CHARGERUSB_CTRL3, BOOST_HW_PWR_EN); |
| 364 | if (ret < 0) { |
| 365 | dev_err(ri->dev, "reg 0x%02x clearbit failed, e = %d\n", |
| 366 | TPS80031_CHARGERUSB_CTRL3, ret); |
| 367 | return ret; |
| 368 | } |
| 369 | |
| 370 | mdelay(DIV_ROUND_UP(ri->rinfo->desc.enable_time, 1000)); |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 371 | if (ri->config_flags & TPS80031_VBUS_DISCHRG_EN_PDN) { |
| 372 | ret = tps80031_write(parent, TPS80031_SLAVE_ID2, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 373 | USB_VBUS_CTRL_CLR, VBUS_DISCHRG); |
| 374 | if (ret < 0) { |
| 375 | dev_err(ri->dev, "reg 0x%02x write failed, e = %d\n", |
| 376 | USB_VBUS_CTRL_CLR, ret); |
| 377 | return ret; |
| 378 | } |
| 379 | } |
| 380 | return ret; |
| 381 | } |
| 382 | |
| 383 | static struct regulator_ops tps80031_dcdc_ops = { |
| 384 | .list_voltage = tps80031_dcdc_list_voltage, |
| 385 | .set_voltage_sel = tps80031_dcdc_set_voltage_sel, |
| 386 | .get_voltage_sel = tps80031_dcdc_get_voltage_sel, |
| 387 | .enable = tps80031_reg_enable, |
| 388 | .disable = tps80031_reg_disable, |
| 389 | .is_enabled = tps80031_reg_is_enabled, |
| 390 | }; |
| 391 | |
| 392 | static struct regulator_ops tps80031_ldo_ops = { |
Axel Lin | 7fa8a59 | 2012-12-06 08:24:11 +0800 | [diff] [blame] | 393 | .list_voltage = regulator_list_voltage_linear, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 394 | .set_voltage_sel = tps80031_ldo_set_voltage_sel, |
| 395 | .get_voltage_sel = tps80031_ldo_get_voltage_sel, |
| 396 | .enable = tps80031_reg_enable, |
| 397 | .disable = tps80031_reg_disable, |
| 398 | .is_enabled = tps80031_reg_is_enabled, |
| 399 | }; |
| 400 | |
| 401 | static struct regulator_ops tps80031_vbus_sw_ops = { |
Axel Lin | bf0caae | 2012-11-23 09:25:54 +0800 | [diff] [blame] | 402 | .list_voltage = regulator_list_voltage_linear, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 403 | .enable = tps80031_vbus_enable, |
| 404 | .disable = tps80031_vbus_disable, |
| 405 | .is_enabled = tps80031_vbus_is_enabled, |
| 406 | }; |
| 407 | |
| 408 | static struct regulator_ops tps80031_vbus_hw_ops = { |
Axel Lin | bf0caae | 2012-11-23 09:25:54 +0800 | [diff] [blame] | 409 | .list_voltage = regulator_list_voltage_linear, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 410 | }; |
| 411 | |
| 412 | static struct regulator_ops tps80031_ext_reg_ops = { |
Axel Lin | bf0caae | 2012-11-23 09:25:54 +0800 | [diff] [blame] | 413 | .list_voltage = regulator_list_voltage_linear, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 414 | .enable = tps80031_reg_enable, |
| 415 | .disable = tps80031_reg_disable, |
| 416 | .is_enabled = tps80031_reg_is_enabled, |
| 417 | }; |
| 418 | |
| 419 | /* Non-exiting default definition for some register */ |
| 420 | #define TPS80031_SMPS3_CFG_FORCE 0 |
| 421 | #define TPS80031_SMPS4_CFG_FORCE 0 |
| 422 | |
| 423 | #define TPS80031_VBUS_CFG_TRANS 0 |
| 424 | #define TPS80031_VBUS_CFG_STATE 0 |
| 425 | |
| 426 | #define TPS80031_REG_SMPS(_id, _volt_id, _pbit) \ |
| 427 | { \ |
| 428 | .trans_reg = TPS80031_##_id##_CFG_TRANS, \ |
| 429 | .state_reg = TPS80031_##_id##_CFG_STATE, \ |
| 430 | .force_reg = TPS80031_##_id##_CFG_FORCE, \ |
| 431 | .volt_reg = TPS80031_##_id##_CFG_VOLTAGE, \ |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 432 | .volt_id = TPS80031_SLAVE_##_volt_id, \ |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 433 | .preq_bit = _pbit, \ |
| 434 | .desc = { \ |
| 435 | .name = "tps80031_"#_id, \ |
| 436 | .id = TPS80031_REGULATOR_##_id, \ |
| 437 | .n_voltages = 63, \ |
| 438 | .ops = &tps80031_dcdc_ops, \ |
| 439 | .type = REGULATOR_VOLTAGE, \ |
| 440 | .owner = THIS_MODULE, \ |
| 441 | .enable_time = 500, \ |
| 442 | }, \ |
| 443 | } |
| 444 | |
| 445 | #define TPS80031_REG_LDO(_id, _preq_bit) \ |
| 446 | { \ |
| 447 | .trans_reg = TPS80031_##_id##_CFG_TRANS, \ |
| 448 | .state_reg = TPS80031_##_id##_CFG_STATE, \ |
| 449 | .volt_reg = TPS80031_##_id##_CFG_VOLTAGE, \ |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 450 | .volt_id = TPS80031_SLAVE_ID1, \ |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 451 | .preq_bit = _preq_bit, \ |
| 452 | .desc = { \ |
| 453 | .owner = THIS_MODULE, \ |
| 454 | .name = "tps80031_"#_id, \ |
| 455 | .id = TPS80031_REGULATOR_##_id, \ |
| 456 | .ops = &tps80031_ldo_ops, \ |
| 457 | .type = REGULATOR_VOLTAGE, \ |
| 458 | .min_uV = 1000000, \ |
| 459 | .uV_step = 100000, \ |
Axel Lin | 7fa8a59 | 2012-12-06 08:24:11 +0800 | [diff] [blame] | 460 | .linear_min_sel = 1, \ |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 461 | .n_voltages = 25, \ |
| 462 | .vsel_mask = LDO_VSEL_MASK, \ |
| 463 | .enable_time = 500, \ |
| 464 | }, \ |
| 465 | } |
| 466 | |
| 467 | #define TPS80031_REG_FIXED(_id, max_mV, _ops, _delay, _pbit) \ |
| 468 | { \ |
| 469 | .trans_reg = TPS80031_##_id##_CFG_TRANS, \ |
| 470 | .state_reg = TPS80031_##_id##_CFG_STATE, \ |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 471 | .volt_id = TPS80031_SLAVE_ID1, \ |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 472 | .preq_bit = _pbit, \ |
| 473 | .desc = { \ |
| 474 | .name = "tps80031_"#_id, \ |
| 475 | .id = TPS80031_REGULATOR_##_id, \ |
Axel Lin | bf0caae | 2012-11-23 09:25:54 +0800 | [diff] [blame] | 476 | .min_uV = max_mV * 1000, \ |
| 477 | .n_voltages = 1, \ |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 478 | .ops = &_ops, \ |
| 479 | .type = REGULATOR_VOLTAGE, \ |
| 480 | .owner = THIS_MODULE, \ |
| 481 | .enable_time = _delay, \ |
| 482 | }, \ |
| 483 | } |
| 484 | |
| 485 | static struct tps80031_regulator_info tps80031_rinfo[TPS80031_REGULATOR_MAX] = { |
| 486 | TPS80031_REG_SMPS(VIO, ID0, 4), |
| 487 | TPS80031_REG_SMPS(SMPS1, ID0, 0), |
| 488 | TPS80031_REG_SMPS(SMPS2, ID0, 1), |
| 489 | TPS80031_REG_SMPS(SMPS3, ID1, 2), |
| 490 | TPS80031_REG_SMPS(SMPS4, ID1, 3), |
| 491 | TPS80031_REG_LDO(VANA, -1), |
| 492 | TPS80031_REG_LDO(LDO1, 8), |
| 493 | TPS80031_REG_LDO(LDO2, 9), |
| 494 | TPS80031_REG_LDO(LDO3, 10), |
| 495 | TPS80031_REG_LDO(LDO4, 11), |
| 496 | TPS80031_REG_LDO(LDO5, 12), |
| 497 | TPS80031_REG_LDO(LDO6, 13), |
| 498 | TPS80031_REG_LDO(LDO7, 14), |
| 499 | TPS80031_REG_LDO(LDOLN, 15), |
| 500 | TPS80031_REG_LDO(LDOUSB, 5), |
| 501 | TPS80031_REG_FIXED(VBUS, 5000, tps80031_vbus_hw_ops, 100000, -1), |
| 502 | TPS80031_REG_FIXED(REGEN1, 3300, tps80031_ext_reg_ops, 0, 16), |
| 503 | TPS80031_REG_FIXED(REGEN2, 3300, tps80031_ext_reg_ops, 0, 17), |
| 504 | TPS80031_REG_FIXED(SYSEN, 3300, tps80031_ext_reg_ops, 0, 18), |
| 505 | }; |
| 506 | |
| 507 | static int tps80031_power_req_config(struct device *parent, |
| 508 | struct tps80031_regulator *ri, |
| 509 | struct tps80031_regulator_platform_data *tps80031_pdata) |
| 510 | { |
| 511 | int ret = 0; |
| 512 | |
| 513 | if (ri->rinfo->preq_bit < 0) |
| 514 | goto skip_pwr_req_config; |
| 515 | |
| 516 | ret = tps80031_ext_power_req_config(parent, ri->ext_ctrl_flag, |
| 517 | ri->rinfo->preq_bit, ri->rinfo->state_reg, |
| 518 | ri->rinfo->trans_reg); |
| 519 | if (ret < 0) { |
| 520 | dev_err(ri->dev, "ext powerreq config failed, err = %d\n", ret); |
| 521 | return ret; |
| 522 | } |
| 523 | |
| 524 | skip_pwr_req_config: |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 525 | if (tps80031_pdata->ext_ctrl_flag & TPS80031_PWR_ON_ON_SLEEP) { |
| 526 | ret = tps80031_update(parent, TPS80031_SLAVE_ID1, |
| 527 | ri->rinfo->trans_reg, TPS80031_TRANS_SLEEP_ON, |
| 528 | TPS80031_TRANS_SLEEP_MASK); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 529 | if (ret < 0) { |
| 530 | dev_err(ri->dev, "Reg 0x%02x update failed, e %d\n", |
| 531 | ri->rinfo->trans_reg, ret); |
| 532 | return ret; |
| 533 | } |
| 534 | } |
| 535 | return ret; |
| 536 | } |
| 537 | |
| 538 | static int tps80031_regulator_config(struct device *parent, |
| 539 | struct tps80031_regulator *ri, |
| 540 | struct tps80031_regulator_platform_data *tps80031_pdata) |
| 541 | { |
| 542 | int ret = 0; |
| 543 | |
| 544 | switch (ri->rinfo->desc.id) { |
| 545 | case TPS80031_REGULATOR_LDOUSB: |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 546 | if (ri->config_flags & (TPS80031_USBLDO_INPUT_VSYS | |
| 547 | TPS80031_USBLDO_INPUT_PMID)) { |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 548 | unsigned val = 0; |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 549 | if (ri->config_flags & TPS80031_USBLDO_INPUT_VSYS) |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 550 | val = MISC2_LDOUSB_IN_VSYS; |
| 551 | else |
| 552 | val = MISC2_LDOUSB_IN_PMID; |
| 553 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 554 | ret = tps80031_update(parent, TPS80031_SLAVE_ID1, |
| 555 | TPS80031_MISC2, val, |
| 556 | MISC2_LDOUSB_IN_MASK); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 557 | if (ret < 0) { |
| 558 | dev_err(ri->dev, |
| 559 | "LDOUSB config failed, e= %d\n", ret); |
| 560 | return ret; |
| 561 | } |
| 562 | } |
| 563 | break; |
| 564 | |
| 565 | case TPS80031_REGULATOR_LDO3: |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 566 | if (ri->config_flags & TPS80031_LDO3_OUTPUT_VIB) { |
| 567 | ret = tps80031_update(parent, TPS80031_SLAVE_ID1, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 568 | TPS80031_MISC2, MISC2_LDO3_SEL_VIB_VAL, |
| 569 | MISC2_LDO3_SEL_VIB_MASK); |
| 570 | if (ret < 0) { |
| 571 | dev_err(ri->dev, |
| 572 | "LDO3 config failed, e = %d\n", ret); |
| 573 | return ret; |
| 574 | } |
| 575 | } |
| 576 | break; |
| 577 | |
| 578 | case TPS80031_REGULATOR_VBUS: |
| 579 | /* Provide SW control Ops if VBUS is SW control */ |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 580 | if (!(ri->config_flags & TPS80031_VBUS_SW_ONLY)) |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 581 | ri->rinfo->desc.ops = &tps80031_vbus_sw_ops; |
| 582 | break; |
| 583 | default: |
| 584 | break; |
| 585 | } |
| 586 | |
| 587 | /* Configure Active state to ON, SLEEP to OFF and OFF_state to OFF */ |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 588 | ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->trans_reg, |
| 589 | TPS80031_TRANS_ACTIVE_ON | TPS80031_TRANS_SLEEP_OFF | |
| 590 | TPS80031_TRANS_OFF_OFF, TPS80031_TRANS_ACTIVE_MASK | |
| 591 | TPS80031_TRANS_SLEEP_MASK | TPS80031_TRANS_OFF_MASK); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 592 | if (ret < 0) { |
| 593 | dev_err(ri->dev, "trans reg update failed, e %d\n", ret); |
| 594 | return ret; |
| 595 | } |
| 596 | |
| 597 | return ret; |
| 598 | } |
| 599 | |
| 600 | static int check_smps_mode_mult(struct device *parent, |
| 601 | struct tps80031_regulator *ri) |
| 602 | { |
| 603 | int mult_offset; |
| 604 | int ret; |
| 605 | u8 smps_offset; |
| 606 | u8 smps_mult; |
| 607 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 608 | ret = tps80031_read(parent, TPS80031_SLAVE_ID1, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 609 | TPS80031_SMPS_OFFSET, &smps_offset); |
| 610 | if (ret < 0) { |
| 611 | dev_err(parent, "Error in reading smps offset register\n"); |
| 612 | return ret; |
| 613 | } |
| 614 | |
Laxman Dewangan | b92f787 | 2012-11-14 21:09:29 +0530 | [diff] [blame] | 615 | ret = tps80031_read(parent, TPS80031_SLAVE_ID1, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 616 | TPS80031_SMPS_MULT, &smps_mult); |
| 617 | if (ret < 0) { |
| 618 | dev_err(parent, "Error in reading smps mult register\n"); |
| 619 | return ret; |
| 620 | } |
| 621 | |
| 622 | switch (ri->rinfo->desc.id) { |
| 623 | case TPS80031_REGULATOR_VIO: |
| 624 | mult_offset = SMPS_MULTOFFSET_VIO; |
| 625 | break; |
| 626 | case TPS80031_REGULATOR_SMPS1: |
| 627 | mult_offset = SMPS_MULTOFFSET_SMPS1; |
| 628 | break; |
| 629 | case TPS80031_REGULATOR_SMPS2: |
| 630 | mult_offset = SMPS_MULTOFFSET_SMPS2; |
| 631 | break; |
| 632 | case TPS80031_REGULATOR_SMPS3: |
| 633 | mult_offset = SMPS_MULTOFFSET_SMPS3; |
| 634 | break; |
| 635 | case TPS80031_REGULATOR_SMPS4: |
| 636 | mult_offset = SMPS_MULTOFFSET_SMPS4; |
| 637 | break; |
| 638 | case TPS80031_REGULATOR_LDO2: |
| 639 | ri->device_flags = smps_mult & BIT(5) ? TRACK_MODE_ENABLE : 0; |
| 640 | /* TRACK mode the ldo2 varies from 600mV to 1300mV */ |
| 641 | if (ri->device_flags & TRACK_MODE_ENABLE) { |
| 642 | ri->rinfo->desc.min_uV = 600000; |
| 643 | ri->rinfo->desc.uV_step = 12500; |
| 644 | ri->rinfo->desc.n_voltages = 57; |
| 645 | ri->rinfo->desc.vsel_mask = LDO_TRACK_VSEL_MASK; |
| 646 | } |
| 647 | return 0; |
| 648 | default: |
| 649 | return 0; |
| 650 | } |
| 651 | |
| 652 | ri->device_flags = (smps_offset & mult_offset) ? DCDC_OFFSET_EN : 0; |
| 653 | ri->device_flags |= (smps_mult & mult_offset) ? DCDC_EXTENDED_EN : 0; |
| 654 | switch (ri->device_flags) { |
| 655 | case 0: |
| 656 | ri->rinfo->desc.min_uV = 607700; |
| 657 | ri->rinfo->desc.uV_step = 12660; |
| 658 | break; |
| 659 | case DCDC_OFFSET_EN: |
| 660 | ri->rinfo->desc.min_uV = 700000; |
| 661 | ri->rinfo->desc.uV_step = 12500; |
| 662 | break; |
| 663 | case DCDC_EXTENDED_EN: |
| 664 | ri->rinfo->desc.min_uV = 1852000; |
| 665 | ri->rinfo->desc.uV_step = 38600; |
| 666 | break; |
| 667 | case DCDC_OFFSET_EN | DCDC_EXTENDED_EN: |
| 668 | ri->rinfo->desc.min_uV = 2161000; |
| 669 | ri->rinfo->desc.uV_step = 38600; |
| 670 | break; |
| 671 | } |
| 672 | return 0; |
| 673 | } |
| 674 | |
Bill Pemberton | a502357 | 2012-11-19 13:22:22 -0500 | [diff] [blame] | 675 | static int tps80031_regulator_probe(struct platform_device *pdev) |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 676 | { |
| 677 | struct tps80031_platform_data *pdata; |
| 678 | struct tps80031_regulator_platform_data *tps_pdata; |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 679 | struct tps80031_regulator *ri; |
| 680 | struct tps80031_regulator *pmic; |
| 681 | struct regulator_dev *rdev; |
| 682 | struct regulator_config config = { }; |
| 683 | int ret; |
| 684 | int num; |
| 685 | |
| 686 | pdata = dev_get_platdata(pdev->dev.parent); |
| 687 | |
| 688 | if (!pdata) { |
| 689 | dev_err(&pdev->dev, "No platform data\n"); |
| 690 | return -EINVAL; |
| 691 | } |
| 692 | |
| 693 | pmic = devm_kzalloc(&pdev->dev, |
| 694 | TPS80031_REGULATOR_MAX * sizeof(*pmic), GFP_KERNEL); |
| 695 | if (!pmic) { |
| 696 | dev_err(&pdev->dev, "mem alloc for pmic failed\n"); |
| 697 | return -ENOMEM; |
| 698 | } |
| 699 | |
| 700 | for (num = 0; num < TPS80031_REGULATOR_MAX; ++num) { |
| 701 | tps_pdata = pdata->regulator_pdata[num]; |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 702 | ri = &pmic[num]; |
Axel Lin | 1a7ae58 | 2012-11-22 16:30:44 +0800 | [diff] [blame] | 703 | ri->rinfo = &tps80031_rinfo[num]; |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 704 | ri->dev = &pdev->dev; |
| 705 | |
| 706 | check_smps_mode_mult(pdev->dev.parent, ri); |
| 707 | config.dev = &pdev->dev; |
| 708 | config.init_data = NULL; |
| 709 | config.driver_data = ri; |
| 710 | if (tps_pdata) { |
| 711 | config.init_data = tps_pdata->reg_init_data; |
| 712 | ri->config_flags = tps_pdata->config_flags; |
| 713 | ri->ext_ctrl_flag = tps_pdata->ext_ctrl_flag; |
| 714 | ret = tps80031_regulator_config(pdev->dev.parent, |
| 715 | ri, tps_pdata); |
| 716 | if (ret < 0) { |
| 717 | dev_err(&pdev->dev, |
| 718 | "regulator config failed, e %d\n", ret); |
| 719 | goto fail; |
| 720 | } |
| 721 | |
| 722 | ret = tps80031_power_req_config(pdev->dev.parent, |
| 723 | ri, tps_pdata); |
| 724 | if (ret < 0) { |
| 725 | dev_err(&pdev->dev, |
| 726 | "pwr_req config failed, err %d\n", ret); |
| 727 | goto fail; |
| 728 | } |
| 729 | } |
| 730 | rdev = regulator_register(&ri->rinfo->desc, &config); |
Axel Lin | d4cbca9 | 2013-01-25 21:29:41 +0800 | [diff] [blame] | 731 | if (IS_ERR(rdev)) { |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 732 | dev_err(&pdev->dev, |
| 733 | "register regulator failed %s\n", |
| 734 | ri->rinfo->desc.name); |
| 735 | ret = PTR_ERR(rdev); |
| 736 | goto fail; |
| 737 | } |
| 738 | ri->rdev = rdev; |
| 739 | } |
| 740 | |
| 741 | platform_set_drvdata(pdev, pmic); |
| 742 | return 0; |
| 743 | fail: |
| 744 | while (--num >= 0) { |
| 745 | ri = &pmic[num]; |
| 746 | regulator_unregister(ri->rdev); |
| 747 | } |
| 748 | return ret; |
| 749 | } |
| 750 | |
Bill Pemberton | 8dc995f | 2012-11-19 13:26:10 -0500 | [diff] [blame] | 751 | static int tps80031_regulator_remove(struct platform_device *pdev) |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 752 | { |
| 753 | struct tps80031_regulator *pmic = platform_get_drvdata(pdev); |
| 754 | struct tps80031_regulator *ri = NULL; |
| 755 | int num; |
| 756 | |
| 757 | for (num = 0; num < TPS80031_REGULATOR_MAX; ++num) { |
| 758 | ri = &pmic[num]; |
| 759 | regulator_unregister(ri->rdev); |
| 760 | } |
| 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | static struct platform_driver tps80031_regulator_driver = { |
| 765 | .driver = { |
| 766 | .name = "tps80031-pmic", |
| 767 | .owner = THIS_MODULE, |
| 768 | }, |
| 769 | .probe = tps80031_regulator_probe, |
Bill Pemberton | 5eb9f2b | 2012-11-19 13:20:42 -0500 | [diff] [blame] | 770 | .remove = tps80031_regulator_remove, |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 771 | }; |
| 772 | |
| 773 | static int __init tps80031_regulator_init(void) |
| 774 | { |
| 775 | return platform_driver_register(&tps80031_regulator_driver); |
| 776 | } |
| 777 | subsys_initcall(tps80031_regulator_init); |
| 778 | |
| 779 | static void __exit tps80031_regulator_exit(void) |
| 780 | { |
| 781 | platform_driver_unregister(&tps80031_regulator_driver); |
| 782 | } |
| 783 | module_exit(tps80031_regulator_exit); |
| 784 | |
| 785 | MODULE_ALIAS("platform:tps80031-regulator"); |
Axel Lin | 1a7ae58 | 2012-11-22 16:30:44 +0800 | [diff] [blame] | 786 | MODULE_DESCRIPTION("Regulator Driver for TI TPS80031/TPS80032 PMIC"); |
Laxman Dewangan | 1a0bb67 | 2012-11-11 20:42:01 +0530 | [diff] [blame] | 787 | MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); |
| 788 | MODULE_LICENSE("GPL v2"); |